Allow adding events with the client.on decorator

telethon/events/__init__.py

@@ -0,0 +1,14 @@
+import abc
+from ..tl import types, functions
+from ..extensions import markdown
+from .. import utils
+
+
+class _EventBuilder(abc.ABC):
+    @abc.abstractmethod
+    def build(self, update):
+        """Builds an event for the given update if possible, or returns None"""
+
+    @abc.abstractmethod
+    def resolve(self, client):
+        """Helper method to allow event builders to be resolved before usage"""